It means we deleted the duplicate entry, but it ended up as a "ghost work", or splinched if you know your Harry Potter 
Basically, works get saved in several parts - for the case of your story, the work and its comments, Likes, things like that is stored separately to the actual words of your story themselves and things like the word count that are specifically for writing.
Basically, works get saved in several parts - for the case of your story, the work and its comments, Likes, things like that is stored separately to the actual words of your story themselves and things like the word count that are specifically for writing.